Substituting a shell variable in sed

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getting error while substituting variable using sed..

I am using script for substitute one variable with another variable like below... below code works fine... sed 's/'$sub_fun'/'$To_sub'/g' But when i run the same code from the script getting below errors.. sed: -e expression #1, char 7: unterminated `s' command please help.......

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Trouble with sed and substituting a string with special characters in variable

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Variable is not substituting values

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substituting variable value in AWK

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have a fileA containing about 260 lines wherein i have to match 2 lines fileA blah blah OF 90 DAYS DOCS PERIOD 12/06/0" Pairs_Id 52006 Amount1 -300000.0 Amount2 15091500.10 Codifiers_Id 0 OriginalId 0 EOT --blah blah blah TBL Tradt_IN CardRate 0.0 hashAmount -15091500.0...

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substituting shell variables

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LEARN ABOUT X11R4

escape

escape(1)							Mail Avenger 0.8.3							 escape(1)

NAME

       escape - escape shell special characters in a string

SYNOPSIS

       escape string

DESCRIPTION

       escape prepends a "" character to all shell special characters in string, making it safe to compose a shell command with the result.

EXAMPLES

       The following is a contrived example showing how one can unintentionally end up executing the contents of a string:

	   $ var='; echo gotcha!'
	   $ eval echo hi $var
	   hi
	   gotcha!
	   $

       Using escape, one can avoid executing the contents of $var:

	   $ eval echo hi `escape "$var"`
	   hi ; echo gotcha!
	   $

       A less contrived example is passing arguments to Mail Avenger bodytest commands containing possibly unsafe environment variables.  For
       example, you might write a hypothetical reject_bcc script to reject mail not explicitly addressed to the recipient:

	   #!/bin/sh
	   formail -x to -x cc -x resent-to -x resent-cc 
	       | fgrep "$1" > /dev/null 
		   && exit 0
	   echo "<$1>.. address does not accept blind carbon copies"
	   exit 100

       To invoke this script, passing it the recipient address as an argument, you would need to put the following in your Mail Avenger rcpt
       script:

	   bodytest reject_bcc `escape "$RECIPIENT"`

SEE ALSO

       avenger(1),

       The Mail Avenger home page: <http://www.mailavenger.org/>.

BUGS

       escape is designed for the Bourne shell, which is what Mail Avenger scripts use.  escape might or might not work with other shells.

AUTHOR

       David Mazieres

Mail Avenger 0.8.3						    2012-04-05								 escape(1)

Shell Programming and Scripting